ENDOSCOPIC SURGICAL DEVICE AND OUTER SLEEVE

• US 20160175006A1
• Filed: 03/02/2016
• Published: 06/23/2016
• Est. Priority Date: 09/03/2013
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: DEJIMA, Takumi
• Granted Patent: US 10,251,671 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 1/00112 Connection or coupling means
• CPC Class Codes: A61B 1/00128 mechanical, e.g. for tubes or pipes
• CPC Class Codes: A61B 1/00135 Oversleeves mounted on the endoscope prior to insertion
• CPC Class Codes: A61B 1/0014 Fastening element for attaching accessories to the outside of an endoscope, e.g. clips, clamps or bands
• CPC Class Codes: A61B 1/00154 using guiding arrangements for insertion
• CPC Class Codes: A61B 1/012 characterised by internal passages or accessories therefor
• CPC Class Codes: A61B 1/018 for receiving instruments
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 2017/22074 the instrument being only slidable in a channel, e.g. advancing optical fibre through a channel
• CPC Class Codes: A61B 2017/3441 with distal sealing means
• CPC Class Codes: A61B 2017/3445 used as instrument channel for multiple instruments catheters A61B2017/22072
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61B 90/37 Surgical systems with images on a monitor during operation

Abstract

Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and operability is high. The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. F1>F2 is satisfied when a fixing force for fixing the endoscope-coupled part to the endoscope tool is defined as F1 and a fixing force for fixing the treatment tool-coupled part to the treatment tool is defined as F2.

Claims

1. An endoscopic surgical device comprising:

an endoscope that observes the inside of a body cavity;

a treatment tool that inspects or treats an affected part within the body cavity; and

an overtube that guides the endoscope and the treatment tool into the body cavity,

wherein the overtube includes

an overtube body that passes through a body wall and is inserted into the body cavity,

an endoscope insertion passage that is provided inside the overtube body and allows the endoscope to be inserted therethrough so as to be movable forward and backward,

a treatment tool insertion passage that is provided inside the overtube body and allows the treatment tool to be inserted therethrough so as to be movable forward and backward, and

an interlocking member that is configured to be movable forward and backward inside the overtube body, has an endoscope-coupled part coupled to the endoscope inserted through the endoscope insertion passage and a treatment tool-coupled part coupled to the treatment tool inserted through the treatment tool insertion passage, and has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other, and

wherein a following formula is satisfied when a fixing force for fixing the endoscope-coupled part to the endoscope is defined as F1 and a fixing force for fixing the treatment tool-coupled part to the treatment tool is defined as F2.

F1>

F2

2. The endoscopic surgical device according to claim 1, further comprising:

a first valve member that is provided in the endoscope insertion passage and secures airtightness within the body cavity; and

a second valve member that is provided in the treatment tool insertion passage and secures airtightness within the body cavity,

wherein following formulas are satisfied when a frictional force that the endoscope receives from the first valve member when the endoscope moves forward and backward is defined as F3.

F1>

F3

F2>

F3

3. The endoscopic surgical device according to claim 1,

wherein the coupling position is set so as to satisfy a following formula when the length from a coupling position of the endoscope to which the endoscope-coupled part is coupled to the distal end position of the overtube body in the axial direction of the overtube body is defined as L and the length from the coupling position to a distal end position of the endoscope in the axial direction of the overtube body is defined as Ls, in a state where the interlocking member has moved to a position closest to a base end position of a movable range thereof.

Ls≧

L

4. The endoscopic surgical device according to claim 1,

wherein the interlocking member includes a slider member that is coupled to the endoscope and moves forward and backward integrally with the endoscope, and a sleeve member that is coupled to the treatment tool and moves forward and backward integrally with the treatment tool, and

wherein a range where the sleeve member is movable forward and backward with respect to the slider member is limited.

5. An overtube comprising:

an overtube body that passes through a body wall and is inserted into a body cavity;

an endoscope insertion passage that is provided inside the overtube body and allows an endoscope for observing the inside of the body cavity to be inserted therethrough so as to be movable forward and backward;

a treatment tool insertion passage that is provided inside the overtube body and allows a treatment tool for inspecting or treating an affected part within the body cavity to be inserted therethrough so as to be movable forward and backward; and

an interlocking member that is configured to be movable forward and backward inside the overtube body, has an endoscope-coupled part coupled to the endoscope inserted through the endoscope insertion passage and a treatment tool-coupled part coupled to the treatment tool inserted through the treatment tool insertion passage, and has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other,

wherein a following formula is satisfied when a fixing force for fixing the endoscope-coupled part to the endoscope tool is defined as F1 and a fixing force for fixing the treatment tool-coupled part to the treatment tool is defined as F2.

F1>

F2

6. The overtube according to claim 5, further comprising:

a first valve member that is provided in the endoscope insertion passage and secures airtightness within the body cavity; and

a second valve member that is provided in the treatment tool insertion passage and secures airtightness within the body cavity,

wherein following formulas are satisfied when a frictional force that the endoscope receives from the first valve member when the endoscope moves forward and backward is defined as F3.

F1>

F3

F2>

F3

7. The overtube according to claim 5,

wherein the coupling position is set so as to satisfy a following formula when the length from a coupling position of the endoscope to which the endoscope-coupled part is coupled to the distal end position of the overtube body in the axial direction of the overtube body is defined as L and the length from the coupling position to a distal end position of the endoscope in the axial direction of the overtube body is defined as Ls, in a state where the interlocking member has moved to a position closest to a base end position of a movable range thereof.

Ls≧

L

8. The overtube according to claim 5,

wherein the interlocking member includes a slider member that is coupled to the endoscope and moves forward and backward integrally with the endoscope, and a sleeve member that is coupled to the treatment tool and moves forward and backward integrally with the treatment tool, and

wherein a range where the sleeve member is movable forward and backward with respect to the slider member is limited.